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Auto flammability

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-06-27 to 2018-08-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of th Tests and Criteria, 6 edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion
Version / remarks:
2015
Deviations:
no
Qualifier:
according to
Guideline:
other: VDI 2263 (1990), sheet 1, Grewer Oven
Version / remarks:
1990
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Relative self-ignition temperature:
>= 390 - <= 420 °C
Remarks on result:
no self-ignition observed up to the melting point

In the investigation of self-ignition in the Grewer Oven the pure test item showed two small endothermic effects in the temperature ranges of 270 - 280 °C and 350 - 360 °C. An exothermic effect was detected starting at a temperature of 390 °C, which led to a maximum temperature of approx. 420 °C (10 K above the corresponding temperature of the reference material). After the test a grey residue was left inside the wire basket.

Conclusions:
The pure test item TA-1 indicated a self-heating at atmospheric pressure starting at a temperature of 390 °C that led to a maximum temperature of 420 °C.
According to this result of the tests on the self-ignition in the Grewer Oven the test item is classified as follows:
UN Transport Regulation: The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.
GHS I CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively.

Description of key information

The pure test item TA-1 indicated a self-heating at atmospheric pressure starting at a temperature of 390 °C that led to

a maximum temperature of 420 °C.

According to this result of the tests on the self-ignition in the Grewer Oven the test item is classified as follows:

The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
390 °C

Additional information